US Bridges

Osage Trail over Bayou Bourdeaux

Good

St. Landry Parish, Louisiana · 0.5 Mi. N. of LA 365 · Structure no. 034930210920951

Built
1987
38 years old
Condition
Good
inspected January 2023
Type
Slab
Concrete
Length
57 ft
3 main spans
Daily traffic
540
2020 count
Owner
County
County Highway Agency

About this bridge

Osage Trail over Bayou Bourdeaux is a concrete slab carrying Osage Trail over Bayou Bourdeaux in St. Landry Parish, Louisiana. It was built in 1987, so it is 38 years old, younger than the Louisiana average of 43 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 540 vehicles a day, projected to reach 594 by 2040. The structure is 57 ft (17.4 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesOsage Trail
CrossesBayou Bourdeaux
Location0.5 Mi. N. of LA 365
RouteCounty Highway 0
CountySt. Landry Parish
StateLouisiana
Coordinates30.35012, -92.15863
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27.9 US tons
Inventory rating21.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span19 ft (5.8 m)
Deck width31 ft (9.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic540 (2020)
Projected traffic594 by 2040
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Osage Trail over Bayou Bourdeaux built?

It was built in 1987, making it 38 years old in 2025.

What condition is Osage Trail over Bayou Bourdeaux in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in January 2023.

How much traffic does Osage Trail over Bayou Bourdeaux carry?

About 540 vehicles per day (2020 count).

How long is Osage Trail over Bayou Bourdeaux?

The structure is 57 ft (17.4 m) long with a longest span of 19 ft (5.8 m) and a deck 31 ft wide.

Who owns Osage Trail over Bayou Bourdeaux?

It is owned by the County Highway Agency.